Shaft structure.



Patented Dec. 25, 1917.

M. A. ROSS.

SHAFT STRUCTURE.

APPLICATION FILED JUNE I6. 1916.

MARK A. BOSS, OF CHICAGO, ILLINOIS.

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Specification of Letters latent.

Patented nee. e5 leis.

llppllcatton fllerl June 16, 1916. SerialNo 103,957.

bearings that are supported by stationary bearin carriers, though the invention is not to be t as limited. The invention has for its 'pbject the provision of an improved assemply of the shaft and the bearing element or elements whereby the arts may be quickly assembled, disassemble and reassembled.

In the preferred embodiment of the invention a roller bearing structure is employed Whose inner raceway is adapted to be coupled with the shaft so as to rotate therewith by means of my invention whereby such raceway may readily he slipped into and out of place. The outer raceway is desirably slidably secured in the carrier therefor and may be removed and replaced together with the first raceway. There is also desirably employed a sleeve which intervenes between the shaft and the inner raceway and which takes part in assembling such raceway with the shaft. 1-

I will explain my invention more fully by reference to the accompanying drawing showing the preferred embodiment thereof and in which Figure 1 is a view of the shaft of a dynamo-electric machine having bearings associated therewith in accordance with my invention; Fig. 2 is a view on line 2-2 of Fig. 1; Fig 3 is a view of component parts in separated relation; and Fig. i is a perspective view illustrating the formation of the end faces of the inner raceway, such formation being similar upon both end faces so that the hearing may he slipped upon the shaft with either end face outermost.

Like parts are indicated by similar characters of reference throughout the diiferent in the embodiment of the invention illustrated the shaft 1 rotates and carries an armature 2 of a dynamo-electric machine whose field ortion 3 is carried by the casing 4:,

This armature shaft carries the usual commutator 5 and an assembling quill shaft 6 desirably intervening bctwecn the shaft 1 and the armature and commutator and held in assembly with the shaft 1 by a key 7. The preferred form of bearing of my invention is illustrated at each end of the shaft. Each bearing has a mounting sleeve 8 that is adapted to he slid oil'- and on the associate reduced end of the shaft and in turn, the inner raceway 1) of each roller bearing is adapted to he slid off and on the sleeve 8 pertaining thereto. The shaft 1, each sleeve 8, and the corresponding innerraceway 9 are assembled to prevent either of these elements from turning with respect to the others by means of a key 10 which is desirably in the form of a pin that is received within of engaged by a groove 11 or other suitable forumtion in the adjacent end face of the I shaft and which pin passes through diametrically aliued openings in the sleeve 8 that are aliued with said groove and the ends of which pin are received in a pair of diametrically alincd grooves 12 in the outer faces of the inner raceway. Pius may be employed to keep the pin 10 from slipping. Balls or other rollers ll turn upon the inner raceway and support the outer raceway 15 which is supported by a carrier 16 or 16 carrier 16 being an end wall of the casing pertaining to the dynamo-electric machine and which casing is suitably mounted in any desired manner. The outer raceway 15 is preferably slidably received in its carrier 16 or 16, whereby the entire roller bearing may be separated from the balance of the structure. A cap 17 is held upon each carrier 16, 16 by means of cap screws 18. Thiscap incloses 'a space'l9 into which the shaft 1 and sleeve 8 project and in which the pin 10 is disposed, this space being preferably filled with lubricating grease for lubricating the adjacent roller bearing. Each sleeve 8 is provided with a flange 20 that projects into a continuation of the space that receives the associate raceways and which serves to obstruct the passage of lubricatinggrease from the roller bearing into the interior'of the dynamo-electric machine. Each carrier has an inward extension 21 that engages the inner face of the corresponding flange 20 and closely approaches but does not come quite in contact with the portion of the associate sleeve 8 that is inwardly extended lfeyond o aha 1 the he .leme

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